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Edit File: keyboard-configuration.postinst

#!/bin/sh

set -e

# Source debconf library.
. /usr/share/debconf/confmodule

# The same as /usr/bin/which - in order to make "which" available before
# /usr is mounted
which () {
    local IFS
    IFS=:
    for i in $PATH; do
	if [ -x "$i/$1" ]; then
	    echo "$i/$1"
	    return 0
	fi
    done
    return 1
}

# In d-i the config script is not executed automatically
if [ -f /usr/share/console-setup/keyboard-configuration.config ]; then
    /usr/share/console-setup/keyboard-configuration.config || exit $?
fi

keyboard_present () {
    local kern kbdpattern class subclass protocol

kern=`uname -r`
    case "$kern" in
	2.0*|2.1*|2.2*|2.3*|2.4*|2.5*)
	    # can't check keyboard presence
	    return 0; 
	    ;;
    esac

[ -d /sys/bus/usb/devices ] || return 0
    for d in /sys/bus/usb/devices/*:*; do
	[ -d "$d" ] || continue
	class=$(cat "$d/bInterfaceClass") # 03 = Human Interface Device
	subclass=$(cat "$d/bInterfaceSubClass") # 01 = Boot Interface Subclass
	protocol=$(cat "$d/bInterfaceProtocol") # 01 = Keyboard
	case "$class:$subclass:$protocol" in
	    03:01:01)
		return 0
		;;
	esac
    done

# For Bluetooth keyboards one has to check the class of the device
    # -- it has to be 0x000540 or 0x002540.  I don't how to make the
    # required test, so instead we test (unreliably) for a string
    # bluetooth.*keyboard in /proc/bus/input/devices.

[ -f /proc/bus/input/devices ] || return 0
    kbdpattern="AT Set \|AT Translated Set\|AT Raw Set"
    kbdpattern="$kbdpattern\|Atari Keyboard"
    kbdpattern="$kbdpattern\|Amiga Keyboard"
    kbdpattern="$kbdpattern\|HIL keyboard"
    kbdpattern="$kbdpattern\|ADB keyboard"
    kbdpattern="$kbdpattern\|Sun Type"
    kbdpattern="$kbdpattern\|bluetooth.*keyboard"
    if grep -i "$kbdpattern" /proc/bus/input/devices >/dev/null; then
	return 0
    fi

return 1
}

# keyboard_present () {
#     if there is a keyboard; then
# 	return 0
#     else
# 	return 1
#     fi
# }

CONFIGFILE=/etc/default/keyboard

if [ "$1" = "configure" -a ! -L "$CONFIGFILE" ]; then
    
    db_get keyboard-configuration/modelcode
    model="$RET"

db_get keyboard-configuration/layoutcode
    layout="$RET"

db_get keyboard-configuration/variantcode
    variant="$RET"

db_get keyboard-configuration/optionscode
    options="$RET"

if [ ! -e $CONFIGFILE ]; then
	cat /usr/share/console-setup/keyboard \
	    2>/dev/null >$CONFIGFILE || true
    fi

# Ensure we do not mess up the config file's ownership and permissions.
    cp -a -f $CONFIGFILE $CONFIGFILE.tmp

# If the admin deleted or commented some variables but then set
    # them via debconf, (re-)add them to the conffile.
    for var in XKBMODEL XKBLAYOUT XKBVARIANT XKBOPTIONS BACKSPACE; do
        if ! grep "^ *${var}=" $CONFIGFILE >/dev/null; then
	    echo "${var}=" >>$CONFIGFILE
	fi
    done    
    
    sed \
	-e "s|^ *XKBMODEL=.*|XKBMODEL=\"$model\"|" \
	-e "s|^ *XKBLAYOUT=.*|XKBLAYOUT=\"$layout\"|" \
	-e "s|^ *XKBVARIANT=.*|XKBVARIANT=\"$variant\"|" \
	-e "s|^ *XKBOPTIONS=.*|XKBOPTIONS=\"$options\"|" \
	-e "s|^ *BACKSPACE=.*|BACKSPACE=\"${BACKSPACE:-guess}\"|" \
	<$CONFIGFILE >$CONFIGFILE.tmp
    
    mv -f $CONFIGFILE.tmp $CONFIGFILE

db_set keyboard-configuration/store_defaults_in_debconf_db true
fi

if [ -d /lib/debian-installer ];
then
    if [ "$DISPLAY" ] && which setxkbmap >/dev/null; then
	setxkbmap -option '' -model "$model" "$layout" "$variant" "$options" || true
	# setting the font corrupts X
	# setting up the keyboard breaks wayland
	if type setupcon >/dev/null 2>&1; then
	    # We redirect the output so that postinst does not block when ScrollLock is on
	    setupcon --save-only >/dev/null 2>/dev/null || true
	    cat >&2 <<EOF
Your console font configuration will be updated the next time your system
boots. If you want to update it now, run 'setupcon' from a virtual console.
EOF
	fi
    else
	case "`uname`" in
	    GNU)
		[ ! -f /var/run/hurd-console.pid ] || kill `cat /var/run/hurd-console.pid`
		;;
	    *)
		if type setupcon >/dev/null 2>&1; then
		    setupcon --force --save >/dev/null 2>/dev/null || true
		fi
		;;
	esac
    fi
else
    # Setting the keymap breaks plymouth in raw mode, and setting the
    # font will currently also break if on vgacon.
    # Setting the font also corrupts X and postinst may be running with
    # stripped environment thus we can't even detect X easily.
    setupcon --save-only >/dev/null 2>/dev/null || true
    cat >&2 <<EOF
Your console font configuration will be updated the next time your system
boots. If you want to update it now, run 'setupcon' from a virtual console.
EOF
fi

if ! [ -d /lib/debian-installer.d ]; then
    dpkg-maintscript-helper rm_conffile \
                            /etc/init.d/keyboard-setup 1.138~ -- "$@"
    dpkg-maintscript-helper rm_conffile \
                            /etc/init.d/console-setup 1.138~ -- "$@"
fi

if type update-initramfs >/dev/null 2>&1; then
    update-initramfs -u
fi

exit 0